While cleaning out the garage I noticed I have enough parts to put together another diff. For sale is an open 1.8L differential. I believe it came out of a 1999 and has 4.11 gears with 60k on it. Some light surface rust on one bearing cap and a few ring gear teeth. Nothing major should wipe off with some WD-40.
It comes with a 1987 RX7 aluminum housing and clutch type LSD. LSD could use a rebuild or a shim. It has about 90k on it and when I place 2 stub shafts in I can turn them the opposite direction by hand (Note, this is just the diff. It still needs to be installed in the open 1.8L carrier). Housing has had the bushings removed and the new MMR ones are still in the box.
Found some RX7 stub shafts I'll throw in too. Please note they do not have the c-clips. I used them for my diff swap.
$450
Parts are located in Hingham, MA
